So I was playing games earlier, and started to hear a rattling sound from my PC. It seemed to be coming from the top of the machine (where the CLC radiator is) -- I was worried about ball bearings, air in the pump, stuff like that. I turned the fans off in the software, and the noise went away. Turned them back on -- noise came back. So I turned the fans off again, and took my dust cover off my case (which gives me access to the radiator from the top). With CLC set to turn the fans off, one fan was off, but another kept going. Checking the stopped fan, it seemed 'floaty', and when I turned it, it seems like it's rubbing against the radiator.
CAn I just buy another 140mm fan and replace this? If so, how would I do this?
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